hw/intc: Introduce x-query-interrupt-controllers QMP command

This is a counterpart to the HMP "info pic" command. It is being
added with an "x-" prefix because this QMP command is intended as an
adhoc debugging tool and will thus not be modelled in QAPI as fully
structured data, nor will it have long term guaranteed stability.
The existing HMP command is rewritten to call the QMP command.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20240610063518.50680-3-philmd@linaro.org>

4 files changed, 47 insertions, 34 deletions

diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
index 20a9835..cfd4ad5 100644
--- a/hmp-commands-info.hx
+++ b/hmp-commands-info.hx
@@ -174,7 +174,7 @@ ERST
         .args_type  = "",
         .params     = "",
         .help       = "show PIC state",
-        .cmd        = hmp_info_pic,
+        .cmd_info_hrt = qmp_x_query_interrupt_controllers,
     },
 
 SRST
diff --git a/hw/core/machine-qmp-cmds.c b/hw/core/machine-qmp-cmds.c
index 5972100..130217d 100644
--- a/hw/core/machine-qmp-cmds.c
+++ b/hw/core/machine-qmp-cmds.c
@@ -361,6 +361,35 @@ HumanReadableText *qmp_x_query_irq(Error **errp)
     return human_readable_text_from_str(buf);
 }
 
+static int qmp_x_query_intc_foreach(Object *obj, void *opaque)
+{
+    InterruptStatsProvider *intc;
+    InterruptStatsProviderClass *k;
+    GString *buf = opaque;
+
+    if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
+        intc = INTERRUPT_STATS_PROVIDER(obj);
+        k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
+        if (k->print_info) {
+            k->print_info(intc, buf);
+        } else {
+            g_string_append_printf(buf,
+                                   "Interrupt controller information not available for %s.\n",
+                                   object_get_typename(obj));
+        }
+    }
+
+    return 0;
+}
+
+HumanReadableText *qmp_x_query_interrupt_controllers(Error **errp)
+{
+    g_autoptr(GString) buf = g_string_new("");
+    object_child_foreach_recursive(object_get_root(),
+                                   qmp_x_query_intc_foreach, buf);
+    return human_readable_text_from_str(buf);
+}
+
 GuidInfo *qmp_query_vm_generation_id(Error **errp)
 {
     GuidInfo *info;
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index fbff7fd..45ee3a9 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -25,9 +25,7 @@
 #include "qapi/qapi-commands-machine.h"
 #include "qapi/qapi-commands-misc.h"
 #include "qapi/qmp/qdict.h"
-#include "qapi/type-helpers.h"
 #include "qemu/cutils.h"
-#include "hw/intc/intc.h"
 #include "qemu/log.h"
 #include "sysemu/sysemu.h"
 
@@ -83,37 +81,6 @@ void hmp_info_version(Monitor *mon, const QDict *qdict)
     qapi_free_VersionInfo(info);
 }
 
-static int hmp_info_pic_foreach(Object *obj, void *opaque)
-{
-    InterruptStatsProvider *intc;
-    InterruptStatsProviderClass *k;
-    Monitor *mon = opaque;
-
-    if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
-        intc = INTERRUPT_STATS_PROVIDER(obj);
-        k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
-        if (k->print_info) {
-            g_autoptr(GString) buf = g_string_new("");
-            g_autoptr(HumanReadableText) info = NULL;
-
-            k->print_info(intc, buf);
-            info = human_readable_text_from_str(buf);
-            monitor_puts(mon, info->human_readable_text);
-        } else {
-            monitor_printf(mon, "Interrupt controller information not available for %s.\n",
-                           object_get_typename(obj));
-        }
-    }
-
-    return 0;
-}
-
-void hmp_info_pic(Monitor *mon, const QDict *qdict)
-{
-    object_child_foreach_recursive(object_get_root(),
-                                   hmp_info_pic_foreach, mon);
-}
-
 void hmp_quit(Monitor *mon, const QDict *qdict)
 {
     monitor_suspend(mon);
diff --git a/qapi/machine.json b/qapi/machine.json
index 453feb9..2fd3e9c 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -1864,3 +1864,20 @@
 { 'command': 'dumpdtb',
   'data': { 'filename': 'str' },
   'if': 'CONFIG_FDT' }
+
+##
+# @x-query-interrupt-controllers:
+#
+# Query information on interrupt controller devices
+#
+# Features:
+#
+# @unstable: This command is meant for debugging.
+#
+# Returns: Interrupt controller devices information
+#
+# Since: 9.1
+##
+{ 'command': 'x-query-interrupt-controllers',
+  'returns': 'HumanReadableText',
+  'features': [ 'unstable' ]}